package com.erms.dao;

import java.util.Date;
import java.util.List;
import org.hibernate.LockMode;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.ApplicationContext;
import org.springframework.orm.hibernate3.support.HibernateDaoSupport;

import com.erms.bean.User;

/**
 * A data access object (DAO) providing persistence and search support for User
 * entities.
 * Transaction control of the save(), update() and delete() operations
 * can directly support Spring container-managed transactions or they can be
 * augmented to handle user-managed Spring transactions.
 * Each of these methods provides additional information for how to configure it
 * for the desired type of transaction control.
 * 
 * @see com.erms.bean.User
 * @author MyEclipse Persistence Tools
 */
public class UserDAO extends HibernateDaoSupport {
	private static final Logger	log			= LoggerFactory
													.getLogger(UserDAO.class);
	// property constants
	public static final String	PASSWORD	= "password";
	public static final String	TYPE		= "type";
	public static final String	NAME		= "name";
	public static final String	SEX			= "sex";
	public static final String	EMAIL		= "email";
	public static final String	PHONE		= "phone";
	public static final String	DORMITORY	= "dormitory";
	public static final String	CLASS_NUM	= "classNum";
	public static final String	OFFICE		= "office";

	protected void initDao() {

		// do nothing
	}

	public void save(User transientInstance) {

		log.debug("saving User instance");
		try {
			getHibernateTemplate().save(transientInstance);
			log.debug("save successful");
		} catch (RuntimeException re) {
			log.error("save failed", re);
			throw re;
		}
	}

	public void delete(User persistentInstance) {

		log.debug("deleting User instance");
		try {
			getHibernateTemplate().delete(persistentInstance);
			log.debug("delete successful");
		} catch (RuntimeException re) {
			log.error("delete failed", re);
			throw re;
		}
	}

	public User findById(java.lang.String id) {

		log.debug("getting User instance with id: " + id);
		try {
			User instance = (User) getHibernateTemplate().get(
					"com.erms.bean.User", id);
			return instance;
		} catch (RuntimeException re) {
			log.error("get failed", re);
			throw re;
		}
	}

	public List findByExample(User instance) {

		log.debug("finding User instance by example");
		try {
			List results = getHibernateTemplate().findByExample(instance);
			log.debug("find by example successful, result size: "
					+ results.size());
			return results;
		} catch (RuntimeException re) {
			log.error("find by example failed", re);
			throw re;
		}
	}

	public List findByProperty(String propertyName, Object value) {

		log.debug("finding User instance with property: " + propertyName
				+ ", value: " + value);
		try {
			String queryString = "from User as model where model."
					+ propertyName + "= ?";
			return getHibernateTemplate().find(queryString, value);
		} catch (RuntimeException re) {
			log.error("find by property name failed", re);
			throw re;
		}
	}

	public List findByPassword(Object password) {

		return findByProperty(PASSWORD, password);
	}

	public List findByType(Object type) {

		return findByProperty(TYPE, type);
	}

	public List findByName(Object name) {

		return findByProperty(NAME, name);
	}

	public List findBySex(Object sex) {

		return findByProperty(SEX, sex);
	}

	public List findByEmail(Object email) {

		return findByProperty(EMAIL, email);
	}

	public List findByPhone(Object phone) {

		return findByProperty(PHONE, phone);
	}

	public List findByDormitory(Object dormitory) {

		return findByProperty(DORMITORY, dormitory);
	}

	public List findByClassNum(Object classNum) {

		return findByProperty(CLASS_NUM, classNum);
	}

	public List findByOffice(Object office) {

		return findByProperty(OFFICE, office);
	}

	public List findAll() {

		log.debug("finding all User instances");
		try {
			String queryString = "from User";
			return getHibernateTemplate().find(queryString);
		} catch (RuntimeException re) {
			log.error("find all failed", re);
			throw re;
		}
	}

	public User merge(User detachedInstance) {

		log.debug("merging User instance");
		try {
			User result = (User) getHibernateTemplate().merge(detachedInstance);
			log.debug("merge successful");
			return result;
		} catch (RuntimeException re) {
			log.error("merge failed", re);
			throw re;
		}
	}

	public void attachDirty(User instance) {

		log.debug("attaching dirty User instance");
		try {
			getHibernateTemplate().saveOrUpdate(instance);
			log.debug("attach successful");
		} catch (RuntimeException re) {
			log.error("attach failed", re);
			throw re;
		}
	}

	public void attachClean(User instance) {

		log.debug("attaching clean User instance");
		try {
			getHibernateTemplate().lock(instance, LockMode.NONE);
			log.debug("attach successful");
		} catch (RuntimeException re) {
			log.error("attach failed", re);
			throw re;
		}
	}

	public static UserDAO getFromApplicationContext(ApplicationContext ctx) {

		return (UserDAO) ctx.getBean("UserDAO");
	}
}
